CN106530619A - Intelligent terminal and method for carrying out human body position identification and falling down detection through using the intelligent terminal - Google Patents
Intelligent terminal and method for carrying out human body position identification and falling down detection through using the intelligent terminal Download PDFInfo
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- CN106530619A CN106530619A CN201611168275.1A CN201611168275A CN106530619A CN 106530619 A CN106530619 A CN 106530619A CN 201611168275 A CN201611168275 A CN 201611168275A CN 106530619 A CN106530619 A CN 106530619A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/04—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons
- G08B21/0407—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis
- G08B21/043—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons based on behaviour analysis detecting an emergency event, e.g. a fall
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/04—Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons
- G08B21/0438—Sensor means for detecting
- G08B21/0446—Sensor means for detecting worn on the body to detect changes of posture, e.g. a fall, inclination, acceleration, gait
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- General Health & Medical Sciences (AREA)
- Gerontology & Geriatric Medicine (AREA)
- Business, Economics & Management (AREA)
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Abstract
The invention relates to an intelligent terminal and a method for carrying out human body position identification and falling down detection through using the intelligent terminal. The intelligent terminal uses an electromagnetic wave to carry out human body position identification. The intelligent terminal comprises a sending module, a receiving module, a FMCW module, a signal processing module and a position positioning module. The sending module is used for sending an electromagnetic wave. The receiving module is used for receiving a reflected electromagnetic wave and sending to the signal processing module and the FMCW module. The FMCW module is used for calculating transmission time of the electromagnetic wave and transmitting to the position positioning module. The signal processing module is used for processing the reflected electromagnetic wave, generating a processing result and transmitting the processing result to the position positioning module. The position positioning module is used for carrying out human body position identification and generating positioning information. In the invention, a human body does not need to wear any sensor, and through a body, the electromagnetic wave is reflected and signal processing and analysis are performed so that position changes of the human body are acquired and then whether the human body falls down is determined.
Description
Technical field
The present invention relates to position and fall detection technology, enter pedestrian more particularly, to a kind of intelligent terminal and with which
Body position recognizes the method with fall detection.
Background technology
In recent years, the technology and Household security system for carrying out position of human body positioning indoors in environment becomes more and more popular.Mesh
On front market, mostly by camera technology come capture images and video, this scheme precision is or not existing human bioequivalence and positioning
Height causes recognition effect bad, and computation complexity is high, and privacy is also a very big problem；Or by passive many
Organize infrared sensor to realize, need human body to wear multiple sensors, this solution technique is complicated, the cost of application and deployment
It is high.
Meanwhile, global Aging Problem is increasingly highlighted, and the elderly has degeneration, institute in terms of balance and coordination function
Often to there is the elderly to fall at home, after falling, the elderly voluntarily cannot stand, and the injured feelings of stupor often occur
Condition, it is even fatal.The healthy and independent living ability of the serious impact the elderly of meeting of falling, and to the elderly's
Psychology will also result in pressure and fear.Caused problem is increasingly severe due to tumble for annual the elderly, and society is for old age
The demand of people's fall detection also becomes more and more urgent.
In order to find tumble situation, in time the elderly is provided and is helped and is succoured, in terms of fall detection with protection
There are some products.In the prior art, the product to human body fall detection, great majority are to need human body to wear sensing
Device, gathers the athletic posture information at certain position of human body, by microcontrollers such as single-chip microcomputers using acceierometer sensor
Judge using the Algorithm Analysis of athletic posture information whether the elderly falls.Wearable sensors, can increase the cost of user；It is long
Time wearable sensors, can affect level of comfort, while in some cases, such as have a bath, it is desirable to which wearable sensors are can not
Capable.
The content of the invention
To overcome the defect of above-mentioned background technology, the present invention to provide a kind of intelligent terminal and carry out position of human body knowledge with which
The method of other and fall detection so that human body need not wear any sensor, and which passes through body reflection electromagnetic wave, carry out letter
Number process and analysis, draw the change in location of human body, and then judge whether to fall.
The present invention provides a kind of intelligent terminal, and which carries out position of human body identification using electromagnetic wave, it is characterised in that the intelligence
Energy terminal includes sending module, receiver module, FMCW (Frequency Modulation Continuous Wave, frequency modulation company
Continuous ripple) module, signal processing module and position locating module, wherein,
The sending module is used to send electromagnetic wave；
The receiver module is used to receive reflection electromagnetic wave, and the reflection electromagnetic wave is sent to the signal processing module
With the FMCW modules；
The FMCW modules are used for the transmission time for calculating electromagnetic wave, and the transmission time is passed to the position positioning
Module；
The signal processing module generates result for processing to the reflection electromagnetic wave, and by the place
Reason result passes to the position locating module；
The position locating module is used for the identification for carrying out position of human body, generates location information.
Specifically, the sending module includes a transmitting element, and it is single that the receiver module includes that two or three receive
Unit, for receiving reflection electromagnetic wave.
Further, the intelligent terminal also includes fall detection module, the positioning of its reception position locating module
Information, carries out fall detection, generates fall detection information.
Further, the intelligent terminal also includes management interface API CGI (Application Programming
Interface, application programming interface；Common Gateway Interface CGI(Common gateway interface)s) module and notify mould
Block, the management interface API CGI modules are connected with internet, for locally or remotely being managed the intelligent terminal；
Contact person is provided with the notification module, by management interface API CGI modules the determining the position locating module
The fall detection information of position information and/or the fall detection module is sent to the contact person.
The present invention provides one kind and carries out position of human body knowledge method for distinguishing using above-mentioned intelligent terminal, and methods described includes following
Step：
The sending module sends electromagnetic wave, and the electromagnetic wave reaches human body, the reflection of Jing human bodies；
The receiver module receives reflection electromagnetic wave, and the reflection electromagnetic wave is sent to the signal processing module；
The FMCW modules calculate the transmission time of electromagnetic wave, and the transmission time is passed to the position positioning mould
Block；
The signal processing module carries out signal transacting to the reflection electromagnetic wave, generates result, and by the place
Reason result passes to the position locating module；
The position locating module carries out the identification of position of human body, generates location information.
Specifically, the signal processing module carries out background noise process, including removes noise and filter electromagnetic ripple.
More specifically, the signal processing module according to build model of ellipse obtain human body two-dimensional space coordinate (x,
y)；Preferably, the signal processing module obtains the three dimensional space coordinate (x, y, z) of human body according to the ellipsoidal model for building.
The present invention provides a kind of method for carrying out position of human body identification and fall detection using above-mentioned intelligent terminal, the method
Comprise the following steps：
The sending module sends electromagnetic wave, and the electromagnetic wave reaches human body, the reflection of Jing human bodies；
The receiver module receives reflection electromagnetic wave, and the reflection electromagnetic wave is sent to the signal processing module；
The FMCW modules calculate the transmission time of electromagnetic wave, and the transmission time is passed to the position positioning mould
Block；
The signal processing module carries out signal transacting to the reflection electromagnetic wave, generates result, and by the place
Reason result passes to the position locating module；
The position locating module carries out the identification of position of human body, generates the three dimensional space coordinate (x, y, z) of human body.
The fall detection module receives the three dimensional space coordinate (x, y, z) of the position locating module, carries out tumble inspection
Survey, generate fall detection information.
Specifically, the fall detection module utilizes the three dimensional space coordinate, is judged by the structure to z-axis model
Whether human body falls.
Further, said method is comprised the following steps：
By the management interface API CGI modules by the location information of the position locating module and/or the tumble
The fall detection information of detection module is sent to the contact person.
The present invention carries out position of human body identification and fall detection by body reflection electromagnetic wave, and human body need not be worn and appoint
What sensor, which passes through body reflection electromagnetic wave, carries out the process and analysis of signal, draws the change in location of human body, and then
Judge whether to fall.The present invention can be used for household safe.Specifically, because it can reflect radio by human body enters pedestrian
The identification of body position, so it may know that whether having invader to enter family, which can be integrated together with security system, automatically
Send warning information.Additionally, in health care industry, system can track the situation of patient.For example, room of the patient at them
Fall with bathroom, it is very important to detect them and when fall.Furthermore, the technology of the human body fall detection of the invention can be with
For family health care field, for the social concern that the elderly easily falls, using the fall detection skill without any wearable device
Art, carries out automatic calling for help to Falls in Old People and provides help.
Description of the drawings
Fig. 1 is the structural representation of the intelligent terminal of the present invention.
Fig. 2 is the operation principle schematic diagram of the FMCW modules of the present invention.
Fig. 3 is the two-dimensional space coordinate schematic diagram of the position of human body of the present invention.
Fig. 4 is the three dimensional space coordinate schematic diagram of the position of human body of the present invention.
Specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in more details, so as to energy
The advantage of the solution of the present invention and its various aspects is more fully understood enough.However, specific embodiments described below and enforcement
Example is only descriptive purpose, rather than limitation of the present invention.
As shown in figure 1, intelligent terminal of the present invention, comprising FMCW modules 101, sending module 102, receiver module
103rd, signal processing module 104, position locating module 105, fall detection module 106,110 He of management interface API CGI modules
Notification module 107.
The sending module 102 sends electromagnetic wave, and the electromagnetic wave reaches human body, the reflection of Jing human bodies.The receiver module
103 receive reflection electromagnetic wave, and the reflection electromagnetic wave is sent to the signal processing module 104.The FMCW modules 101 are counted
The transmission time of electromagnetic wave is calculated, and the transmission time is passed to into the position locating module 105.The signal processing module
104 pairs of reflection electromagnetic waves carry out signal transacting, generate result, and the result is passed to the position positioning
Module 105.The position locating module 105 carries out the identification of position of human body, generates location information.
Further, the fall detection module 106 receives the location information of the position locating module 105, is fallen
Detect, generate fall detection information.
Further, the notification module 107 is fixed by the position by the management interface API CGI modules 110
The position location information of module 105 and/or the fall detection information of the fall detection module 106 are sent to the contact person.
Specifically, sending module 102 carries out the transmission of electromagnetic wave, and receiver module 103 carries out the reception of electromagnetic wave, wherein sending out
Send module 102 include transmitting element and receiving unit respectively with receiver module 103.
As shown in Fig. 2 FMCW modules 101 pass through CW with frequency modulation FMCW (Frequency Modulation
Continuous Wave) technology, using send electromagnetic wave and receive electromagnetic wave frequency difference, obtain the transmission of electromagnetic wave
Time ToF (Time of Flight).
Signal processing module 104 carries out the process of the background noise of signal, including removes stationary body reflected signal.Electromagnetism
Ripple runs into people during sending and receiving, not only to be known from experience and produces reflection, and runs into stationary body and can also produce reflection, than
Such as wall, desk, sofa, furniture etc..As electromagnetic wave is during sending and receiving, the reflected signal of stationary body, relatively
The reflected signal of human body, can be many by force, so the reflection of stationary body must be disposed by we, can just obtain the reflection of human body
Signal.Due to the position of stationary body will not be over time change and change, so stationary body frequency of the reflection to signal
Displacement is a constant value relative to time variable.In the signal processing module 104 of the present invention, by adjacent scanning week
Signal in phase carries out Fourier transform, so as to delete the reflected signal of stationary body introducing.
Remove for the reflection of stationary body, two radio frequency sending sets can also be used, launch two groups of same frequencies respectively
But the contrary electromagnetic wave of waveform is gone out, electromagnetic wave encounters barrier meeting reflected refraction decay, when finally encountering the human body of motion
Receiver module 103 can be reflected back.As due to static body of wall with barrier to the characteristic that reflection of electromagnetic wave decays being, so
The reflected signal of two electromagnetic waves can be cancelled out each other, and leave behind the reflecting part after encountering movement human, can thus divide
The object of motion is discerned, monitoring resolution ratio is improved.
Additionally, in a practical situation, some electromagnetic waves reflect through human body and directly reach receiver module 103, some electromagnetism
Ripple is reflected through human body, can also be reflected by other objects in environment again, and this signal is referred to as dynamic object reflection letter by us
Number.The dynamic object reflected signal is most long compared to the path that the signal experience for directly reaching reception device 2 is reflected by human body,
Frequency shifting is maximum, and the shortest path of the signal experience for directly reaching reception device 2 is reflected by human body, and frequency shifting is most
It is little.After the repeatedly process of above-mentioned stationary body reflection, the nethermost edge of remaining most strong reflectance signal can be recorded,
So as to obtain the reflection through shortest path, the purpose for deleting the reflected signal that dynamic object is introduced has been reached.
In order to improve the precision of identification, signal processing module 104 also needs to do following process：
Remove noise：In actual people's running body, speed is typically in 2m/s, so in the very short time, moving
Distance is also very short.If run at short notice, significantly changing occurs very much in distance, is irrational, it should belong to
In noise, need to remove the impact of these noises.
Filter：The operation of human body is continuous, so the signal after human body reflection reaches receiver module 103, meter
The distance change for obtaining is should also be with time smooth change.
Then by the signal processed through signal processing module 104 incoming position locating module 105, by FMCW modules
101, can obtain electromagnetic wave process apart from d, such as shown in formula (1)：
D=d1+d2 (1),
Wherein, d1 is distance of the transmitting element to human body, and d2 is distance of the human body to receiving unit.
As shown in figure 3, in two-dimensional space, according to oval definition, the track of human body equivalent to transmitting element and
Receiving unit antenna is focus, on elliptical boundary of the focal length sum for d.If we using transmitting element and
Two receiving units, it will obtain 2 oval tracks.First oval track is connect with transmitting element and first
Receipts unit is focus, and distance is the ellipse of d；Second oval track is with transmitting element and second receiving unit as Jiao
Point, ellipse of the distance for d.As the track of human body needs to meet the requirement of 2 elliptical paths above simultaneously, so it
Intersecting point will likely be human body position.
As shown in figure 3,2 elliptical paths will have 2 intersecting points, p1 and p2.Due to the transmission list that we use
Unit and receiving unit are directive, so it is rational only on one of which direction, so as to navigate to specific phase
Intersection point, it is assumed that for p1.The position of P1 points, the corresponding information comprising x and y-axis, so as to obtained human body two-dimensional space coordinate (x,
y)。
As shown in Figure 4, it is preferable that the track of human body equivalent to transmitting element and receiving unit as focus, to focus away from
From the spheroid that sum is d.If now using a transmitting element and two receiving units, it will obtain 2 ellipsoids and cross
Where, as a result it is an arc, it is impossible to position the concrete track of human body.Therefore, we are connect using a transmitting element and three
Unit is received, 3 ellipsoids cross, it will obtain a point, so as to obtain the three dimensional space coordinate (x, y, z) of human body.
The speed of electromagnetic wave is light velocity C.Electromagnetic wave reaches human body, after reflection, reaches reception device 2, using formula：
Distance=speed C × time, can obtain electromagnetic wave process apart from d, wherein, FMCW modules 101 are according to sending signal and connecing
The difference of the frequency of the collection of letters number, can obtain two-way time ToF (Time of Flight) back and forth.By time ToF, and then
Obtain electromagnetic wave process apart from d.
In three-dimensional coordinate, it is assumed that the reflection point position of human body is (x, y, z), the position of transmitting element for (xs, ys,
Zs), the position of receiving unit is (xr, yr, zr).
Transmission signal reaches pip, after reflecting point reflection reaches receiving point, electromagnetic wave pass through apart from d such as formula
(2) shown in：
As shown in Fig. 2 in the present invention, time ToF is obtained using FMCW modes.FMCW by sending module 102 to
Outer transmission linear series CW with frequency modulation, and receive the reflected signal of human body.The frequency of transmitted wave presses modulation voltage with the time
Rule changes.Transmitted wave is identical with the shape of back wave, simply has a delay △ t in time, postpones △ t and be the time
Shown in ToF, such as formula (3)：
△ t=2d/C (3),
Wherein, △ t：The time delay of transmitted wave and back wave；d：The distance that electromagnetic wave is passed through；C：The light velocity, C=3 ×
108m/s。
As shown in Fig. 2 transmission signal is mixing output IF signal frequency △ f with the difference on the frequency of reflected signal, during delay
Between △ t and frequency △ f relation such as formula (4) it is shown：
△ t/ △ f=T/2B (4),
Wherein, △ f：The difference on the frequency of transmission signal and reflected signal；T：The modulated signal cycle；B：Modulation bandwidth.
By formula (3) and formula (4), formula (5) is obtained.
D=CT* △ f/4B (5).
Finally, with reference to formula (2) and (5), obtain the formula (6) of ellipsoid：
3 ellipsoids cross, it will obtain a point, so as to obtain the three dimensional space coordinate (x, y, z) of human body.
After by above-mentioned Geometric Modeling, the two and three dimensions space coordinates of human body is obtained.Using three dimensional space coordinate
By fall detection module 106, value, can judge by the structure to z-axis model whether human body falls.
Human body fall when, can have it is following the characteristics of.
A the z-axis coordinate of () human body should be close to horizontal plane as far as possible.
B the z-axis of () human body has a very big decline jump in a short period of time.
Above-mentioned two condition is reached only simultaneously, just will be considered that it is that human body is fallen.If only meeting first condition, and not
Meet second condition, it may be possible to which human body is sat on the ground；If only meeting second condition, and it is unsatisfactory for first bar
Part, it may be possible to which human body is seated on the seat.
Finally, notification module 107 by the management interface API CGI modules 110 by the position locating module 105
The fall detection information of location information and/or the fall detection module 106 is sent to the contact person.
It should be noted that each embodiment above by reference to described by accompanying drawing is only to illustrate rather than restriction originally
The scope of invention, it will be understood by those within the art that, it is right under the premise without departing from the spirit and scope of the present invention
Modification or equivalent that the present invention is carried out, all should cover within the scope of the present invention.Additionally, indication unless the context
Outward, the word for occurring in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of can with reference to any other embodiment all or part of using.
Claims (11)
1. a kind of intelligent terminal, which carries out position of human body identification using electromagnetic wave, it is characterised in that the intelligent terminal includes sending out
Module, receiver module, FMCW modules, signal processing module and position locating module are sent, wherein,
The sending module is used to send electromagnetic wave；
The receiver module is used to receive reflection electromagnetic wave, and the reflection electromagnetic wave is sent to the signal processing module and institute
State FMCW modules；
The FMCW modules are used for the transmission time for calculating electromagnetic wave, and the transmission time is passed to the position positioning mould
Block；
The signal processing module generates result, and described process is tied for processing to the reflection electromagnetic wave
Fruit passes to the position locating module；
The position locating module is used for the identification for carrying out position of human body, generates location information.
2. intelligent terminal as claimed in claim 1, it is characterised in that the intelligent terminal also includes fall detection module, its
The location information of the position locating module is received, fall detection is carried out, fall detection information is generated.
3. intelligent terminal as claimed in claim 2, it is characterised in that the intelligent terminal also includes management interface API CGI
Module and notification module, the management interface API CGI modules are connected with internet, for locally or remotely being managed institute
State intelligent terminal；Contact person is provided with the notification module, it is the position is fixed by the management interface API CGI modules
The position location information of module and/or the fall detection information of the fall detection module are sent to the contact person.
4. the intelligent terminal as described in claim 1-3 is arbitrary, it is characterised in that the sending module includes that sends single
Unit, the receiver module include two or three receiving units.
5. a kind of arbitrary described intelligent terminal of claim 1-4 carries out position of human body knowledge method for distinguishing, it is characterised in that institute
The method of stating is comprised the following steps：
The sending module sends electromagnetic wave, and the electromagnetic wave reaches human body, the reflection of Jing human bodies；
The receiver module receives reflection electromagnetic wave, and the reflection electromagnetic wave is sent to the signal processing module；
The FMCW modules calculate the transmission time of electromagnetic wave, and the transmission time is passed to the position locating module；
The signal processing module carries out signal transacting to the reflection electromagnetic wave, generates result, and described process is tied
Fruit passes to the position locating module；
The position locating module carries out the identification of position of human body, generates location information.
6. method as claimed in claim 5, it is characterised in that the signal transacting carries out background noise process, including removal
Noise and filter electromagnetic ripple.
7. the method as described in claim 5 or 6, it is characterised in that the signal processing module is according to the model of ellipse for building
Obtain two-dimensional space coordinate (x, y) of human body, or according to the ellipsoidal model for building obtain human body three dimensional space coordinate (x, y,
z)。
8. method as claimed in claim 7, it is characterised in that the method comprising the steps of：
The location information of the position locating module is sent to by the contact person by the management interface API CGI modules.
9. a kind of method for carrying out fall detection with the arbitrary described intelligent terminal of claim 2-4, it is characterised in that the side
Method is comprised the following steps：
The sending module sends electromagnetic wave, and the electromagnetic wave reaches human body, the reflection of Jing human bodies；
The receiver module receives reflection electromagnetic wave, and the reflection electromagnetic wave is sent to the signal processing module；
The FMCW modules calculate the transmission time of electromagnetic wave, and the transmission time is passed to the position locating module；
The signal processing module carries out signal transacting to the reflection electromagnetic wave, generates result, and described process is tied
Fruit passes to the position locating module；
The position locating module carries out the identification of position of human body, generates the three dimensional space coordinate (x, y, z) of human body.
The fall detection module receives the three dimensional space coordinate (x, y, z) of the position locating module, carries out fall detection, raw
Into fall detection information.
10. method as claimed in claim 9, it is characterised in that the fall detection module utilizes the three dimensional space coordinate,
Judge by the structure to z-axis model whether human body falls.
11. methods as described in claim 9 or 10, it is characterised in that the method comprising the steps of：
By the management interface API CGI modules by the location information and/or the fall detection of the position locating module
The fall detection information of module is sent to the contact person.
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| CN116798187A (en) * | 2023-05-29 | 2023-09-22 | 杭州惠耳听力技术设备有限公司 | Old people falling monitoring method and hearing aid with old people falling monitoring function |
| CN116798187B (en) * | 2023-05-29 | 2024-06-07 | 杭州惠耳听力技术设备有限公司 | Old people falling monitoring method and hearing aid with old people falling monitoring function |
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